API tools faq
paste
Advertisement
Guest User

Untitled

a guest
Jul 21st, 2018
63
0
Never
Add comment
Not a member of Pastebin yet? Sign Up, it unlocks many cool features!
text 49.62 KB | None | 0 0
raw download clone embed print report
  1. VERSION = 3
  2. PATCHLEVEL = 10
  3. SUBLEVEL = 108
  4. EXTRAVERSION =
  5. NAME = END-OF-LIFE
  6.  
  7. # *DOCUMENTATION*
  8. # To see a list of typical targets execute "make help"
  9. # More info can be located in ./README
  10. # Comments in this file are targeted only to the developer, do not
  11. # expect to learn how to build the kernel reading this file.
  12.  
  13. # Do not:
  14. # o use make's built-in rules and variables
  15. # (this increases performance and avoids hard-to-debug behaviour);
  16. # o print "Entering directory ...";
  17. MAKEFLAGS += -rR --no-print-directory
  18.  
  19. # Avoid funny character set dependencies
  20. unexport LC_ALL
  21. LC_COLLATE=C
  22. LC_NUMERIC=C
  23. export LC_COLLATE LC_NUMERIC
  24.  
  25. # We are using a recursive build, so we need to do a little thinking
  26. # to get the ordering right.
  27. #
  28. # Most importantly: sub-Makefiles should only ever modify files in
  29. # their own directory. If in some directory we have a dependency on
  30. # a file in another dir (which doesn't happen often, but it's often
  31. # unavoidable when linking the built-in.o targets which finally
  32. # turn into vmlinux), we will call a sub make in that other dir, and
  33. # after that we are sure that everything which is in that other dir
  34. # is now up to date.
  35. #
  36. # The only cases where we need to modify files which have global
  37. # effects are thus separated out and done before the recursive
  38. # descending is started. They are now explicitly listed as the
  39. # prepare rule.
  40.  
  41. # To put more focus on warnings, be less verbose as default
  42. # Use 'make V=1' to see the full commands
  43.  
  44. ifeq ("$(origin V)", "command line")
  45. KBUILD_VERBOSE = $(V)
  46. endif
  47. ifndef KBUILD_VERBOSE
  48. KBUILD_VERBOSE = 0
  49. endif
  50.  
  51. # Call a source code checker (by default, "sparse") as part of the
  52. # C compilation.
  53. #
  54. # Use 'make C=1' to enable checking of only re-compiled files.
  55. # Use 'make C=2' to enable checking of *all* source files, regardless
  56. # of whether they are re-compiled or not.
  57. #
  58. # See the file "Documentation/sparse.txt" for more details, including
  59. # where to get the "sparse" utility.
  60.  
  61. ifeq ("$(origin C)", "command line")
  62. KBUILD_CHECKSRC = $(C)
  63. endif
  64. ifndef KBUILD_CHECKSRC
  65. KBUILD_CHECKSRC = 0
  66. endif
  67.  
  68. # Use make M=dir to specify directory of external module to build
  69. # Old syntax make ... SUBDIRS=$PWD is still supported
  70. # Setting the environment variable KBUILD_EXTMOD take precedence
  71. ifdef SUBDIRS
  72. KBUILD_EXTMOD ?= $(SUBDIRS)
  73. endif
  74.  
  75. ifeq ("$(origin M)", "command line")
  76. KBUILD_EXTMOD := $(M)
  77. endif
  78.  
  79. # kbuild supports saving output files in a separate directory.
  80. # To locate output files in a separate directory two syntaxes are supported.
  81. # In both cases the working directory must be the root of the kernel src.
  82. # 1) O=
  83. # Use "make O=dir/to/store/output/files/"
  84. #
  85. # 2) Set KBUILD_OUTPUT
  86. # Set the environment variable KBUILD_OUTPUT to point to the directory
  87. # where the output files shall be placed.
  88. # export KBUILD_OUTPUT=dir/to/store/output/files/
  89. # make
  90. #
  91. # The O= assignment takes precedence over the KBUILD_OUTPUT environment
  92. # variable.
  93.  
  94.  
  95. # KBUILD_SRC is set on invocation of make in OBJ directory
  96. # KBUILD_SRC is not intended to be used by the regular user (for now)
  97. ifeq ($(KBUILD_SRC),)
  98.  
  99. # OK, Make called in directory where kernel src resides
  100. # Do we want to locate output files in a separate directory?
  101. ifeq ("$(origin O)", "command line")
  102. KBUILD_OUTPUT := $(O)
  103. endif
  104.  
  105. ifeq ("$(origin W)", "command line")
  106. export KBUILD_ENABLE_EXTRA_GCC_CHECKS := $(W)
  107. endif
  108.  
  109. # That's our default target when none is given on the command line
  110. PHONY := _all
  111. _all:
  112.  
  113. # Cancel implicit rules on top Makefile
  114. $(CURDIR)/Makefile Makefile: ;
  115.  
  116. ifneq ($(KBUILD_OUTPUT),)
  117. # Invoke a second make in the output directory, passing relevant variables
  118. # check that the output directory actually exists
  119. saved-output := $(KBUILD_OUTPUT)
  120. KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
  121. $(if $(KBUILD_OUTPUT),, \
  122. $(error output directory "$(saved-output)" does not exist))
  123.  
  124. PHONY += $(MAKECMDGOALS) sub-make
  125.  
  126. $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
  127. @:
  128.  
  129. sub-make: FORCE
  130. $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
  131. KBUILD_SRC=$(CURDIR) \
  132. KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
  133. $(filter-out _all sub-make,$(MAKECMDGOALS))
  134.  
  135. # Leave processing to above invocation of make
  136. skip-makefile := 1
  137. endif # ifneq ($(KBUILD_OUTPUT),)
  138. endif # ifeq ($(KBUILD_SRC),)
  139.  
  140. # We process the rest of the Makefile if this is the final invocation of make
  141. ifeq ($(skip-makefile),)
  142.  
  143. # If building an external module we do not care about the all: rule
  144. # but instead _all depend on modules
  145. PHONY += all
  146. ifeq ($(KBUILD_EXTMOD),)
  147. _all: all
  148. else
  149. _all: modules
  150. endif
  151.  
  152. srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
  153. objtree := $(CURDIR)
  154. src := $(srctree)
  155. obj := $(objtree)
  156.  
  157. VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
  158.  
  159. export srctree objtree VPATH
  160.  
  161.  
  162. # SUBARCH tells the usermode build what the underlying arch is. That is set
  163. # first, and if a usermode build is happening, the "ARCH=um" on the command
  164. # line overrides the setting of ARCH below. If a native build is happening,
  165. # then ARCH is assigned, getting whatever value it gets normally, and
  166. # SUBARCH is subsequently ignored.
  167.  
  168. SUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \
  169. -e s/sun4u/sparc64/ \
  170. -e s/arm.*/arm/ -e s/sa110/arm/ \
  171. -e s/s390x/s390/ -e s/parisc64/parisc/ \
  172. -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
  173. -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ )
  174.  
  175. # Cross compiling and selecting different set of gcc/bin-utils
  176. # ---------------------------------------------------------------------------
  177. #
  178. # When performing cross compilation for other architectures ARCH shall be set
  179. # to the target architecture. (See arch/* for the possibilities).
  180. # ARCH can be set during invocation of make:
  181. # make ARCH=ia64
  182. # Another way is to have ARCH set in the environment.
  183. # The default ARCH is the host where make is executed.
  184.  
  185. # CROSS_COMPILE specify the prefix used for all executables used
  186. # during compilation. Only gcc and related bin-utils executables
  187. # are prefixed with $(CROSS_COMPILE).
  188. # CROSS_COMPILE can be set on the command line
  189. # make CROSS_COMPILE=ia64-linux-
  190. # Alternatively CROSS_COMPILE can be set in the environment.
  191. # A third alternative is to store a setting in .config so that plain
  192. # "make" in the configured kernel build directory always uses that.
  193. # Default value for CROSS_COMPILE is not to prefix executables
  194. # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
  195. ARCH ?= $(SUBARCH)
  196. CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%)
  197.  
  198. # Architecture as present in compile.h
  199. UTS_MACHINE := $(ARCH)
  200. SRCARCH := $(ARCH)
  201.  
  202. # Additional ARCH settings for x86
  203. ifeq ($(ARCH),i386)
  204. SRCARCH := x86
  205. endif
  206. ifeq ($(ARCH),x86_64)
  207. SRCARCH := x86
  208. endif
  209.  
  210. # Additional ARCH settings for sparc
  211. ifeq ($(ARCH),sparc32)
  212. SRCARCH := sparc
  213. endif
  214. ifeq ($(ARCH),sparc64)
  215. SRCARCH := sparc
  216. endif
  217.  
  218. # Additional ARCH settings for sh
  219. ifeq ($(ARCH),sh64)
  220. SRCARCH := sh
  221. endif
  222.  
  223. # Additional ARCH settings for tile
  224. ifeq ($(ARCH),tilepro)
  225. SRCARCH := tile
  226. endif
  227. ifeq ($(ARCH),tilegx)
  228. SRCARCH := tile
  229. endif
  230.  
  231. # Where to locate arch specific headers
  232. hdr-arch := $(SRCARCH)
  233.  
  234. KCONFIG_CONFIG ?= .config
  235. export KCONFIG_CONFIG
  236.  
  237. # SHELL used by kbuild
  238. CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
  239. else if [ -x /bin/bash ]; then echo /bin/bash; \
  240. else echo sh; fi ; fi)
  241.  
  242. CCACHE := $(shell which ccache)
  243. HOSTCC = $(CCACHE) gcc
  244. HOSTCXX = $(CCACHE) g++
  245. HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer -std=gnu89
  246. HOSTCXXFLAGS = -O2
  247.  
  248. # Decide whether to build built-in, modular, or both.
  249. # Normally, just do built-in.
  250.  
  251. KBUILD_MODULES :=
  252. KBUILD_BUILTIN := 1
  253.  
  254. # If we have only "make modules", don't compile built-in objects.
  255. # When we're building modules with modversions, we need to consider
  256. # the built-in objects during the descend as well, in order to
  257. # make sure the checksums are up to date before we record them.
  258.  
  259. ifeq ($(MAKECMDGOALS),modules)
  260. KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
  261. endif
  262.  
  263. # If we have "make <whatever> modules", compile modules
  264. # in addition to whatever we do anyway.
  265. # Just "make" or "make all" shall build modules as well
  266.  
  267. ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
  268. KBUILD_MODULES := 1
  269. endif
  270.  
  271. ifeq ($(MAKECMDGOALS),)
  272. KBUILD_MODULES := 1
  273. endif
  274.  
  275. export KBUILD_MODULES KBUILD_BUILTIN
  276. export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
  277.  
  278. # Beautify output
  279. # ---------------------------------------------------------------------------
  280. #
  281. # Normally, we echo the whole command before executing it. By making
  282. # that echo $($(quiet)$(cmd)), we now have the possibility to set
  283. # $(quiet) to choose other forms of output instead, e.g.
  284. #
  285. # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
  286. # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
  287. #
  288. # If $(quiet) is empty, the whole command will be printed.
  289. # If it is set to "quiet_", only the short version will be printed.
  290. # If it is set to "silent_", nothing will be printed at all, since
  291. # the variable $(silent_cmd_cc_o_c) doesn't exist.
  292. #
  293. # A simple variant is to prefix commands with $(Q) - that's useful
  294. # for commands that shall be hidden in non-verbose mode.
  295. #
  296. # $(Q)ln $@ :<
  297. #
  298. # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
  299. # If KBUILD_VERBOSE equals 1 then the above command is displayed.
  300.  
  301. ifeq ($(KBUILD_VERBOSE),1)
  302. quiet =
  303. Q =
  304. else
  305. quiet=quiet_
  306. Q = @
  307. endif
  308.  
  309. # If the user is running make -s (silent mode), suppress echoing of
  310. # commands
  311.  
  312. ifneq ($(filter s% -s%,$(MAKEFLAGS)),)
  313. quiet=silent_
  314. endif
  315.  
  316. export quiet Q KBUILD_VERBOSE
  317.  
  318.  
  319. # Look for make include files relative to root of kernel src
  320. MAKEFLAGS += --include-dir=$(srctree)
  321.  
  322. # We need some generic definitions (do not try to remake the file).
  323. $(srctree)/scripts/Kbuild.include: ;
  324. include $(srctree)/scripts/Kbuild.include
  325.  
  326. # Make variables (CC, etc...)
  327.  
  328. AS = $(CROSS_COMPILE)as
  329. LD = $(CROSS_COMPILE)ld
  330. CC = $(CCACHE) $(CROSS_COMPILE)gcc
  331. CPP = $(CC) -E
  332. AR = $(CROSS_COMPILE)ar
  333. NM = $(CROSS_COMPILE)nm
  334. STRIP = $(CROSS_COMPILE)strip
  335. OBJCOPY = $(CROSS_COMPILE)objcopy
  336. OBJDUMP = $(CROSS_COMPILE)objdump
  337. AWK = awk
  338. GENKSYMS = scripts/genksyms/genksyms
  339. INSTALLKERNEL := installkernel
  340. DEPMOD = /sbin/depmod
  341. PERL = perl
  342. CHECK = sparse
  343.  
  344. CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
  345. -Wbitwise -Wno-return-void $(CF)
  346. CFLAGS_MODULE =
  347. AFLAGS_MODULE =
  348. LDFLAGS_MODULE =
  349. CFLAGS_KERNEL =
  350. AFLAGS_KERNEL =
  351. CFLAGS_GCOV = -fprofile-arcs -ftest-coverage
  352.  
  353.  
  354. # Use USERINCLUDE when you must reference the UAPI directories only.
  355. USERINCLUDE := \
  356. -I$(srctree)/arch/$(hdr-arch)/include/uapi \
  357. -Iarch/$(hdr-arch)/include/generated/uapi \
  358. -I$(srctree)/drivers/soc/qcom \
  359. -I$(srctree)/include/uapi \
  360. -Iinclude/generated/uapi \
  361. -include $(srctree)/include/linux/kconfig.h
  362.  
  363. # Use LINUXINCLUDE when you must reference the include/ directory.
  364. # Needed to be compatible with the O= option
  365. LINUXINCLUDE := \
  366. -I$(srctree)/arch/$(hdr-arch)/include \
  367. -Iarch/$(hdr-arch)/include/generated \
  368. $(if $(KBUILD_SRC), -I$(srctree)/include) \
  369. -Iinclude \
  370. $(USERINCLUDE)
  371.  
  372. KBUILD_CPPFLAGS := -D__KERNEL__
  373.  
  374. KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
  375. -fno-strict-aliasing -fno-common \
  376. -Werror-implicit-function-declaration \
  377. -Wno-format-security \
  378. -fno-delete-null-pointer-checks \
  379. -std=gnu89
  380.  
  381. KBUILD_AFLAGS_KERNEL :=
  382. KBUILD_CFLAGS_KERNEL :=
  383. KBUILD_AFLAGS := -D__ASSEMBLY__
  384. KBUILD_AFLAGS_MODULE := -DMODULE
  385. KBUILD_CFLAGS_MODULE := -DMODULE
  386. KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
  387.  
  388. # Read KERNELRELEASE from include/config/kernel.release (if it exists)
  389. KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
  390. KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
  391.  
  392. export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
  393. export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
  394. export CPP AR NM STRIP OBJCOPY OBJDUMP
  395. export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
  396. export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
  397.  
  398. export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
  399. export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV CFLAGS_KASAN
  400. export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
  401. export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
  402. export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
  403. export KBUILD_ARFLAGS
  404.  
  405. # When compiling out-of-tree modules, put MODVERDIR in the module
  406. # tree rather than in the kernel tree. The kernel tree might
  407. # even be read-only.
  408. export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
  409.  
  410. # Files to ignore in find ... statements
  411.  
  412. RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS \
  413. -o -name .pc -o -name .hg -o -name .git \) -prune -o
  414. export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
  415. --exclude CVS --exclude .pc --exclude .hg --exclude .git
  416.  
  417. # ===========================================================================
  418. # Rules shared between *config targets and build targets
  419.  
  420. # Basic helpers built in scripts/
  421. PHONY += scripts_basic
  422. scripts_basic:
  423. $(Q)$(MAKE) $(build)=scripts/basic
  424. $(Q)rm -f .tmp_quiet_recordmcount
  425.  
  426. # To avoid any implicit rule to kick in, define an empty command.
  427. scripts/basic/%: scripts_basic ;
  428.  
  429. PHONY += outputmakefile
  430. # outputmakefile generates a Makefile in the output directory, if using a
  431. # separate output directory. This allows convenient use of make in the
  432. # output directory.
  433. outputmakefile:
  434. ifneq ($(KBUILD_SRC),)
  435. $(Q)ln -fsn $(srctree) source
  436. $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
  437. $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
  438. endif
  439.  
  440. # Support for using generic headers in asm-generic
  441. PHONY += asm-generic
  442. asm-generic:
  443. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
  444. src=asm obj=arch/$(SRCARCH)/include/generated/asm
  445. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
  446. src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm
  447.  
  448. # To make sure we do not include .config for any of the *config targets
  449. # catch them early, and hand them over to scripts/kconfig/Makefile
  450. # It is allowed to specify more targets when calling make, including
  451. # mixing *config targets and build targets.
  452. # For example 'make oldconfig all'.
  453. # Detect when mixed targets is specified, and make a second invocation
  454. # of make so .config is not included in this case either (for *config).
  455.  
  456. version_h := include/generated/uapi/linux/version.h
  457.  
  458. no-dot-config-targets := clean mrproper distclean \
  459. cscope gtags TAGS tags help %docs check% coccicheck \
  460. $(version_h) headers_% archheaders archscripts \
  461. kernelversion %src-pkg
  462.  
  463. config-targets := 0
  464. mixed-targets := 0
  465. dot-config := 1
  466.  
  467. ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
  468. ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
  469. dot-config := 0
  470. endif
  471. endif
  472.  
  473. ifeq ($(KBUILD_EXTMOD),)
  474. ifneq ($(filter config %config,$(MAKECMDGOALS)),)
  475. config-targets := 1
  476. ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
  477. mixed-targets := 1
  478. endif
  479. endif
  480. endif
  481.  
  482. ifeq ($(mixed-targets),1)
  483. # ===========================================================================
  484. # We're called with mixed targets (*config and build targets).
  485. # Handle them one by one.
  486.  
  487. %:: FORCE
  488. $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
  489.  
  490. else
  491. ifeq ($(config-targets),1)
  492. # ===========================================================================
  493. # *config targets only - make sure prerequisites are updated, and descend
  494. # in scripts/kconfig to make the *config target
  495.  
  496. # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
  497. # KBUILD_DEFCONFIG may point out an alternative default configuration
  498. # used for 'make defconfig'
  499. include $(srctree)/arch/$(SRCARCH)/Makefile
  500. export KBUILD_DEFCONFIG KBUILD_KCONFIG
  501.  
  502. config: scripts_basic outputmakefile FORCE
  503. $(Q)mkdir -p include/linux include/config
  504. $(Q)$(MAKE) $(build)=scripts/kconfig $@
  505.  
  506. %config: scripts_basic outputmakefile FORCE
  507. $(Q)mkdir -p include/linux include/config
  508. $(Q)$(MAKE) $(build)=scripts/kconfig $@
  509.  
  510. else
  511. # ===========================================================================
  512. # Build targets only - this includes vmlinux, arch specific targets, clean
  513. # targets and others. In general all targets except *config targets.
  514.  
  515. ifeq ($(KBUILD_EXTMOD),)
  516. # Additional helpers built in scripts/
  517. # Carefully list dependencies so we do not try to build scripts twice
  518. # in parallel
  519. PHONY += scripts
  520. scripts: scripts_basic include/config/auto.conf include/config/tristate.conf \
  521. asm-generic
  522. $(Q)$(MAKE) $(build)=$(@)
  523.  
  524. # Objects we will link into vmlinux / subdirs we need to visit
  525. init-y := init/
  526. drivers-y := drivers/ sound/ firmware/
  527. net-y := net/
  528. libs-y := lib/
  529. core-y := usr/
  530. endif # KBUILD_EXTMOD
  531.  
  532. ifeq ($(dot-config),1)
  533. # Read in config
  534. -include include/config/auto.conf
  535.  
  536. ifeq ($(KBUILD_EXTMOD),)
  537. # Read in dependencies to all Kconfig* files, make sure to run
  538. # oldconfig if changes are detected.
  539. -include include/config/auto.conf.cmd
  540.  
  541. # To avoid any implicit rule to kick in, define an empty command
  542. $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
  543.  
  544. # If .config is newer than include/config/auto.conf, someone tinkered
  545. # with it and forgot to run make oldconfig.
  546. # if auto.conf.cmd is missing then we are probably in a cleaned tree so
  547. # we execute the config step to be sure to catch updated Kconfig files
  548. include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
  549. $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
  550. else
  551. # external modules needs include/generated/autoconf.h and include/config/auto.conf
  552. # but do not care if they are up-to-date. Use auto.conf to trigger the test
  553. PHONY += include/config/auto.conf
  554.  
  555. include/config/auto.conf:
  556. $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
  557. echo >&2; \
  558. echo >&2 " ERROR: Kernel configuration is invalid."; \
  559. echo >&2 " include/generated/autoconf.h or $@ are missing.";\
  560. echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
  561. echo >&2 ; \
  562. /bin/false)
  563.  
  564. endif # KBUILD_EXTMOD
  565.  
  566. else
  567. # Dummy target needed, because used as prerequisite
  568. include/config/auto.conf: ;
  569. endif # $(dot-config)
  570.  
  571. # The all: target is the default when no target is given on the
  572. # command line.
  573. # This allow a user to issue only 'make' to build a kernel including modules
  574. # Defaults to vmlinux, but the arch makefile usually adds further targets
  575. all: vmlinux
  576.  
  577. ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
  578. KBUILD_CFLAGS += -Os $(call cc-disable-warning,maybe-uninitialized,)
  579. else
  580. KBUILD_CFLAGS += -O2
  581. endif
  582.  
  583. include $(srctree)/arch/$(SRCARCH)/Makefile
  584.  
  585. ifdef CONFIG_READABLE_ASM
  586. # Disable optimizations that make assembler listings hard to read.
  587. # reorder blocks reorders the control in the function
  588. # ipa clone creates specialized cloned functions
  589. # partial inlining inlines only parts of functions
  590. KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
  591. $(call cc-option,-fno-ipa-cp-clone,) \
  592. $(call cc-option,-fno-partial-inlining)
  593. endif
  594.  
  595. ifneq ($(CONFIG_FRAME_WARN),0)
  596. KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
  597. endif
  598.  
  599. # Handle stack protector mode.
  600. ifdef CONFIG_CC_STACKPROTECTOR_REGULAR
  601. stackp-flag := -fstack-protector
  602. ifeq ($(call cc-option, $(stackp-flag)),)
  603. $(warning Cannot use CONFIG_CC_STACKPROTECTOR_REGULAR: \
  604. -fstack-protector not supported by compiler)
  605. endif
  606. else
  607. ifdef CONFIG_CC_STACKPROTECTOR_STRONG
  608. stackp-flag := -fstack-protector-strong
  609. ifeq ($(call cc-option, $(stackp-flag)),)
  610. $(warning Cannot use CONFIG_CC_STACKPROTECTOR_STRONG: \
  611. -fstack-protector-strong not supported by compiler)
  612. endif
  613. else
  614. # Force off for distro compilers that enable stack protector by default.
  615. stackp-flag := $(call cc-option, -fno-stack-protector)
  616. endif
  617. endif
  618. KBUILD_CFLAGS += $(stackp-flag)
  619.  
  620. # This warning generated too much noise in a regular build.
  621. # Use make W=1 to enable this warning (see scripts/Makefile.build)
  622. KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
  623.  
  624. ifdef CONFIG_FRAME_POINTER
  625. KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
  626. else
  627. # Some targets (ARM with Thumb2, for example), can't be built with frame
  628. # pointers. For those, we don't have FUNCTION_TRACER automatically
  629. # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
  630. # incompatible with -fomit-frame-pointer with current GCC, so we don't use
  631. # -fomit-frame-pointer with FUNCTION_TRACER.
  632. ifndef CONFIG_FUNCTION_TRACER
  633. KBUILD_CFLAGS += -fomit-frame-pointer
  634. endif
  635. endif
  636.  
  637. KBUILD_CFLAGS += $(call cc-option, -fno-var-tracking-assignments)
  638.  
  639. ifdef CONFIG_DEBUG_INFO
  640. KBUILD_CFLAGS += -g
  641. KBUILD_AFLAGS += -gdwarf-2
  642. endif
  643.  
  644. ifdef CONFIG_DEBUG_INFO_REDUCED
  645. KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \
  646. $(call cc-option,-fno-var-tracking)
  647. endif
  648.  
  649. ifdef CONFIG_FUNCTION_TRACER
  650. ifdef CONFIG_HAVE_FENTRY
  651. CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY)
  652. endif
  653. KBUILD_CFLAGS += -pg $(CC_USING_FENTRY)
  654. KBUILD_AFLAGS += $(CC_USING_FENTRY)
  655. ifdef CONFIG_DYNAMIC_FTRACE
  656. ifdef CONFIG_HAVE_C_RECORDMCOUNT
  657. BUILD_C_RECORDMCOUNT := y
  658. export BUILD_C_RECORDMCOUNT
  659. endif
  660. endif
  661. endif
  662.  
  663. # We trigger additional mismatches with less inlining
  664. ifdef CONFIG_DEBUG_SECTION_MISMATCH
  665. KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
  666. endif
  667.  
  668. # arch Makefile may override CC so keep this after arch Makefile is included
  669. NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
  670. CHECKFLAGS += $(NOSTDINC_FLAGS)
  671.  
  672. # warn about C99 declaration after statement
  673. KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
  674.  
  675. # disable pointer signed / unsigned warnings in gcc 4.0
  676. KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
  677.  
  678. # disable invalid "can't wrap" optimizations for signed / pointers
  679. KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
  680.  
  681. # conserve stack if available
  682. KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
  683.  
  684. # use the deterministic mode of AR if available
  685. KBUILD_ARFLAGS := $(call ar-option,D)
  686.  
  687. # check for 'asm goto'
  688. ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)
  689. KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
  690. endif
  691.  
  692. include $(srctree)/scripts/Makefile.kasan
  693.  
  694. # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
  695. KBUILD_CPPFLAGS += $(KCPPFLAGS)
  696. KBUILD_AFLAGS += $(KAFLAGS)
  697. KBUILD_CFLAGS += $(KCFLAGS)
  698.  
  699. # Use --build-id when available.
  700. LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
  701. $(call cc-ldoption, -Wl$(comma)--build-id,))
  702. KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
  703. LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
  704.  
  705. ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
  706. LDFLAGS_vmlinux += $(call ld-option, -X,)
  707. endif
  708.  
  709. LDFLAGS_vmlinux += $(call ld-option, --fix-cortex-a53-843419)
  710. LDFLAGS_MODULE += $(call ld-option, --fix-cortex-a53-843419)
  711.  
  712. # Default kernel image to build when no specific target is given.
  713. # KBUILD_IMAGE may be overruled on the command line or
  714. # set in the environment
  715. # Also any assignments in arch/$(ARCH)/Makefile take precedence over
  716. # this default value
  717. export KBUILD_IMAGE ?= vmlinux
  718.  
  719. #
  720. # INSTALL_PATH specifies where to place the updated kernel and system map
  721. # images. Default is /boot, but you can set it to other values
  722. export INSTALL_PATH ?= /boot
  723.  
  724. #
  725. # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
  726. # relocations required by build roots. This is not defined in the
  727. # makefile but the argument can be passed to make if needed.
  728. #
  729.  
  730. MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
  731. export MODLIB
  732.  
  733. #
  734. # INSTALL_MOD_STRIP, if defined, will cause modules to be
  735. # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
  736. # the default option --strip-debug will be used. Otherwise,
  737. # INSTALL_MOD_STRIP value will be used as the options to the strip command.
  738.  
  739. ifdef INSTALL_MOD_STRIP
  740. ifeq ($(INSTALL_MOD_STRIP),1)
  741. mod_strip_cmd = $(STRIP) --strip-debug
  742. else
  743. mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
  744. endif # INSTALL_MOD_STRIP=1
  745. else
  746. mod_strip_cmd = true
  747. endif # INSTALL_MOD_STRIP
  748. export mod_strip_cmd
  749.  
  750.  
  751. ifdef CONFIG_MODULE_SIG_ALL
  752. MODSECKEY = ./signing_key.priv
  753. MODPUBKEY = ./signing_key.x509
  754. export MODPUBKEY
  755. mod_sign_cmd = perl $(srctree)/scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODSECKEY) $(MODPUBKEY)
  756. else
  757. mod_sign_cmd = true
  758. endif
  759. export mod_sign_cmd
  760.  
  761.  
  762. ifeq ($(KBUILD_EXTMOD),)
  763. core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
  764.  
  765. vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
  766. $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
  767. $(net-y) $(net-m) $(libs-y) $(libs-m)))
  768.  
  769. vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
  770. $(init-n) $(init-) \
  771. $(core-n) $(core-) $(drivers-n) $(drivers-) \
  772. $(net-n) $(net-) $(libs-n) $(libs-))))
  773.  
  774. init-y := $(patsubst %/, %/built-in.o, $(init-y))
  775. core-y := $(patsubst %/, %/built-in.o, $(core-y))
  776. drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
  777. net-y := $(patsubst %/, %/built-in.o, $(net-y))
  778. libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
  779. libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
  780. libs-y := $(libs-y1) $(libs-y2)
  781.  
  782. # Externally visible symbols (used by link-vmlinux.sh)
  783. export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
  784. export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y)
  785. export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
  786. export LDFLAGS_vmlinux
  787. # used by scripts/pacmage/Makefile
  788. export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools virt)
  789.  
  790. vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN)
  791.  
  792. # Final link of vmlinux
  793. cmd_link-vmlinux = $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux)
  794. quiet_cmd_link-vmlinux = LINK $@
  795.  
  796. # Include targets which we want to
  797. # execute if the rest of the kernel build went well.
  798. vmlinux: scripts/link-vmlinux.sh $(vmlinux-deps) FORCE
  799. ifdef CONFIG_HEADERS_CHECK
  800. $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
  801. endif
  802. ifdef CONFIG_SAMPLES
  803. $(Q)$(MAKE) $(build)=samples
  804. endif
  805. ifdef CONFIG_BUILD_DOCSRC
  806. $(Q)$(MAKE) $(build)=Documentation
  807. endif
  808. +$(call if_changed,link-vmlinux)
  809.  
  810. # The actual objects are generated when descending,
  811. # make sure no implicit rule kicks in
  812. $(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
  813.  
  814. # Handle descending into subdirectories listed in $(vmlinux-dirs)
  815. # Preset locale variables to speed up the build process. Limit locale
  816. # tweaks to this spot to avoid wrong language settings when running
  817. # make menuconfig etc.
  818. # Error messages still appears in the original language
  819.  
  820. PHONY += $(vmlinux-dirs)
  821. $(vmlinux-dirs): prepare scripts
  822. $(Q)$(MAKE) $(build)=$@
  823.  
  824. # Store (new) KERNELRELASE string in include/config/kernel.release
  825. include/config/kernel.release: include/config/auto.conf FORCE
  826. $(Q)rm -f $@
  827. $(Q)echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" > $@
  828.  
  829.  
  830. # Things we need to do before we recursively start building the kernel
  831. # or the modules are listed in "prepare".
  832. # A multi level approach is used. prepareN is processed before prepareN-1.
  833. # archprepare is used in arch Makefiles and when processed asm symlink,
  834. # version.h and scripts_basic is processed / created.
  835.  
  836. # Listed in dependency order
  837. PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
  838.  
  839. # prepare3 is used to check if we are building in a separate output directory,
  840. # and if so do:
  841. # 1) Check that make has not been executed in the kernel src $(srctree)
  842. prepare3: include/config/kernel.release
  843. ifneq ($(KBUILD_SRC),)
  844. @$(kecho) ' Using $(srctree) as source for kernel'
  845. $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
  846. echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \
  847. echo >&2 " in the '$(srctree)' directory.";\
  848. /bin/false; \
  849. fi;
  850. endif
  851.  
  852. # prepare2 creates a makefile if using a separate output directory
  853. prepare2: prepare3 outputmakefile asm-generic
  854.  
  855. prepare1: prepare2 $(version_h) include/generated/utsrelease.h \
  856. include/config/auto.conf
  857. $(cmd_crmodverdir)
  858.  
  859. archprepare: archheaders archscripts prepare1 scripts_basic
  860.  
  861. prepare0: archprepare FORCE
  862. $(Q)$(MAKE) $(build)=.
  863.  
  864. # All the preparing..
  865. prepare: prepare0
  866.  
  867. # Generate some files
  868. # ---------------------------------------------------------------------------
  869.  
  870. # KERNELRELEASE can change from a few different places, meaning version.h
  871. # needs to be updated, so this check is forced on all builds
  872.  
  873. uts_len := 64
  874. define filechk_utsrelease.h
  875. if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
  876. echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
  877. exit 1; \
  878. fi; \
  879. (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
  880. endef
  881.  
  882. define filechk_version.h
  883. (echo \#define LINUX_VERSION_CODE $(shell \
  884. expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
  885. echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
  886. endef
  887.  
  888. $(version_h): $(srctree)/Makefile FORCE
  889. $(call filechk,version.h)
  890.  
  891. include/generated/utsrelease.h: include/config/kernel.release FORCE
  892. $(call filechk,utsrelease.h)
  893.  
  894. PHONY += headerdep
  895. headerdep:
  896. $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
  897. $(srctree)/scripts/headerdep.pl -I$(srctree)/include
  898.  
  899. # ---------------------------------------------------------------------------
  900.  
  901. PHONY += depend dep
  902. depend dep:
  903. @echo '*** Warning: make $@ is unnecessary now.'
  904.  
  905. # ---------------------------------------------------------------------------
  906. # Firmware install
  907. INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
  908. export INSTALL_FW_PATH
  909.  
  910. PHONY += firmware_install
  911. firmware_install: FORCE
  912. @mkdir -p $(objtree)/firmware
  913. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
  914.  
  915. # ---------------------------------------------------------------------------
  916. # Kernel headers
  917.  
  918. #Default location for installed headers
  919. export INSTALL_HDR_PATH = $(objtree)/usr
  920.  
  921. hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
  922.  
  923. # If we do an all arch process set dst to asm-$(hdr-arch)
  924. hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
  925.  
  926. PHONY += archheaders
  927. archheaders:
  928.  
  929. PHONY += archscripts
  930. archscripts:
  931.  
  932. PHONY += __headers
  933. __headers: $(version_h) scripts_basic asm-generic archheaders archscripts FORCE
  934. $(Q)$(MAKE) $(build)=scripts build_unifdef
  935.  
  936. PHONY += headers_install_all
  937. headers_install_all:
  938. $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
  939.  
  940. PHONY += headers_install
  941. headers_install: __headers
  942. $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \
  943. $(error Headers not exportable for the $(SRCARCH) architecture))
  944. $(Q)$(MAKE) $(hdr-inst)=include/uapi
  945. $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst)
  946.  
  947. PHONY += headers_check_all
  948. headers_check_all: headers_install_all
  949. $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
  950.  
  951. PHONY += headers_check
  952. headers_check: headers_install
  953. $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1
  954. $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1
  955.  
  956. # ---------------------------------------------------------------------------
  957. # Modules
  958.  
  959. ifdef CONFIG_MODULES
  960.  
  961. # By default, build modules as well
  962.  
  963. all: modules
  964.  
  965. # Build modules
  966. #
  967. # A module can be listed more than once in obj-m resulting in
  968. # duplicate lines in modules.order files. Those are removed
  969. # using awk while concatenating to the final file.
  970.  
  971. PHONY += modules
  972. modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
  973. $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
  974. @$(kecho) ' Building modules, stage 2.';
  975. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
  976. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
  977.  
  978. modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
  979. $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
  980.  
  981. %/modules.builtin: include/config/auto.conf
  982. $(Q)$(MAKE) $(modbuiltin)=$*
  983.  
  984.  
  985. # Target to prepare building external modules
  986. PHONY += modules_prepare
  987. modules_prepare: prepare scripts
  988.  
  989. # Target to install modules
  990. PHONY += modules_install
  991. modules_install: _modinst_ _modinst_post
  992.  
  993. PHONY += _modinst_
  994. _modinst_:
  995. @rm -rf $(MODLIB)/kernel
  996. @rm -f $(MODLIB)/source
  997. @mkdir -p $(MODLIB)/kernel
  998. @ln -s $(srctree) $(MODLIB)/source
  999. @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
  1000. rm -f $(MODLIB)/build ; \
  1001. ln -s $(objtree) $(MODLIB)/build ; \
  1002. fi
  1003. @cp -f $(objtree)/modules.order $(MODLIB)/
  1004. @cp -f $(objtree)/modules.builtin $(MODLIB)/
  1005. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
  1006.  
  1007. # This depmod is only for convenience to give the initial
  1008. # boot a modules.dep even before / is mounted read-write. However the
  1009. # boot script depmod is the master version.
  1010. PHONY += _modinst_post
  1011. _modinst_post: _modinst_
  1012. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
  1013. $(call cmd,depmod)
  1014.  
  1015. ifeq ($(CONFIG_MODULE_SIG), y)
  1016. PHONY += modules_sign
  1017. modules_sign:
  1018. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
  1019. endif
  1020.  
  1021. else # CONFIG_MODULES
  1022.  
  1023. # Modules not configured
  1024. # ---------------------------------------------------------------------------
  1025.  
  1026. modules modules_install: FORCE
  1027. @echo >&2
  1028. @echo >&2 "The present kernel configuration has modules disabled."
  1029. @echo >&2 "Type 'make config' and enable loadable module support."
  1030. @echo >&2 "Then build a kernel with module support enabled."
  1031. @echo >&2
  1032. @exit 1
  1033.  
  1034. endif # CONFIG_MODULES
  1035.  
  1036. ###
  1037. # Cleaning is done on three levels.
  1038. # make clean Delete most generated files
  1039. # Leave enough to build external modules
  1040. # make mrproper Delete the current configuration, and all generated files
  1041. # make distclean Remove editor backup files, patch leftover files and the like
  1042.  
  1043. # Directories & files removed with 'make clean'
  1044. CLEAN_DIRS += $(MODVERDIR)
  1045.  
  1046. # Directories & files removed with 'make mrproper'
  1047. MRPROPER_DIRS += include/config usr/include include/generated \
  1048. arch/*/include/generated
  1049. MRPROPER_FILES += .config .config.old .version .old_version $(version_h) \
  1050. Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
  1051. signing_key.priv signing_key.x509 x509.genkey \
  1052. extra_certificates signing_key.x509.keyid \
  1053. signing_key.x509.signer
  1054.  
  1055. # clean - Delete most, but leave enough to build external modules
  1056. #
  1057. clean: rm-dirs := $(CLEAN_DIRS)
  1058. clean: rm-files := $(CLEAN_FILES)
  1059. clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
  1060.  
  1061. PHONY += $(clean-dirs) clean archclean vmlinuxclean
  1062. $(clean-dirs):
  1063. $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
  1064.  
  1065. vmlinuxclean:
  1066. $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
  1067.  
  1068. clean: archclean vmlinuxclean
  1069.  
  1070. # mrproper - Delete all generated files, including .config
  1071. #
  1072. mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
  1073. mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
  1074. mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
  1075.  
  1076. PHONY += $(mrproper-dirs) mrproper archmrproper
  1077. $(mrproper-dirs):
  1078. $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
  1079.  
  1080. mrproper: clean archmrproper $(mrproper-dirs)
  1081. $(call cmd,rmdirs)
  1082. $(call cmd,rmfiles)
  1083.  
  1084. # distclean
  1085. #
  1086. PHONY += distclean
  1087.  
  1088. distclean: mrproper
  1089. @find $(srctree) $(RCS_FIND_IGNORE) \
  1090. \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
  1091. -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
  1092. -o -name '.*.rej' \
  1093. -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
  1094. -type f -print | xargs rm -f
  1095.  
  1096.  
  1097. # Packaging of the kernel to various formats
  1098. # ---------------------------------------------------------------------------
  1099. # rpm target kept for backward compatibility
  1100. package-dir := $(srctree)/scripts/package
  1101.  
  1102. %src-pkg: FORCE
  1103. $(Q)$(MAKE) $(build)=$(package-dir) $@
  1104. %pkg: include/config/kernel.release FORCE
  1105. $(Q)$(MAKE) $(build)=$(package-dir) $@
  1106. rpm: include/config/kernel.release FORCE
  1107. $(Q)$(MAKE) $(build)=$(package-dir) $@
  1108.  
  1109.  
  1110. # Brief documentation of the typical targets used
  1111. # ---------------------------------------------------------------------------
  1112.  
  1113. boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
  1114. boards := $(notdir $(boards))
  1115. board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
  1116. board-dirs := $(sort $(notdir $(board-dirs:/=)))
  1117.  
  1118. help:
  1119. @echo 'Cleaning targets:'
  1120. @echo ' clean - Remove most generated files but keep the config and'
  1121. @echo ' enough build support to build external modules'
  1122. @echo ' mrproper - Remove all generated files + config + various backup files'
  1123. @echo ' distclean - mrproper + remove editor backup and patch files'
  1124. @echo ''
  1125. @echo 'Configuration targets:'
  1126. @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
  1127. @echo ''
  1128. @echo 'Other generic targets:'
  1129. @echo ' all - Build all targets marked with [*]'
  1130. @echo '* vmlinux - Build the bare kernel'
  1131. @echo '* modules - Build all modules'
  1132. @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
  1133. @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
  1134. @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
  1135. @echo ' dir/ - Build all files in dir and below'
  1136. @echo ' dir/file.[oisS] - Build specified target only'
  1137. @echo ' dir/file.lst - Build specified mixed source/assembly target only'
  1138. @echo ' (requires a recent binutils and recent build (System.map))'
  1139. @echo ' dir/file.ko - Build module including final link'
  1140. @echo ' modules_prepare - Set up for building external modules'
  1141. @echo ' tags/TAGS - Generate tags file for editors'
  1142. @echo ' cscope - Generate cscope index'
  1143. @echo ' gtags - Generate GNU GLOBAL index'
  1144. @echo ' kernelrelease - Output the release version string'
  1145. @echo ' kernelversion - Output the version stored in Makefile'
  1146. @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
  1147. echo ' (default: $(INSTALL_HDR_PATH))'; \
  1148. echo ''
  1149. @echo 'Static analysers'
  1150. @echo ' checkstack - Generate a list of stack hogs'
  1151. @echo ' namespacecheck - Name space analysis on compiled kernel'
  1152. @echo ' versioncheck - Sanity check on version.h usage'
  1153. @echo ' includecheck - Check for duplicate included header files'
  1154. @echo ' export_report - List the usages of all exported symbols'
  1155. @echo ' headers_check - Sanity check on exported headers'
  1156. @echo ' headerdep - Detect inclusion cycles in headers'
  1157. @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
  1158. @echo ''
  1159. @echo 'Kernel packaging:'
  1160. @$(MAKE) $(build)=$(package-dir) help
  1161. @echo ''
  1162. @echo 'Documentation targets:'
  1163. @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
  1164. @echo ''
  1165. @echo 'Architecture specific targets ($(SRCARCH)):'
  1166. @$(if $(archhelp),$(archhelp),\
  1167. echo ' No architecture specific help defined for $(SRCARCH)')
  1168. @echo ''
  1169. @$(if $(boards), \
  1170. $(foreach b, $(boards), \
  1171. printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
  1172. echo '')
  1173. @$(if $(board-dirs), \
  1174. $(foreach b, $(board-dirs), \
  1175. printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
  1176. printf " %-16s - Show all of the above\\n" help-boards; \
  1177. echo '')
  1178.  
  1179. @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
  1180. @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
  1181. @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
  1182. @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
  1183. @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
  1184. @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
  1185. @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
  1186. @echo ' 1: warnings which may be relevant and do not occur too often'
  1187. @echo ' 2: warnings which occur quite often but may still be relevant'
  1188. @echo ' 3: more obscure warnings, can most likely be ignored'
  1189. @echo ' Multiple levels can be combined with W=12 or W=123'
  1190. @echo ''
  1191. @echo 'Execute "make" or "make all" to build all targets marked with [*] '
  1192. @echo 'For further info see the ./README file'
  1193.  
  1194.  
  1195. help-board-dirs := $(addprefix help-,$(board-dirs))
  1196.  
  1197. help-boards: $(help-board-dirs)
  1198.  
  1199. boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
  1200.  
  1201. $(help-board-dirs): help-%:
  1202. @echo 'Architecture specific targets ($(SRCARCH) $*):'
  1203. @$(if $(boards-per-dir), \
  1204. $(foreach b, $(boards-per-dir), \
  1205. printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
  1206. echo '')
  1207.  
  1208.  
  1209. # Documentation targets
  1210. # ---------------------------------------------------------------------------
  1211. %docs: scripts_basic FORCE
  1212. $(Q)$(MAKE) $(build)=scripts build_docproc
  1213. $(Q)$(MAKE) $(build)=Documentation/DocBook $@
  1214.  
  1215. else # KBUILD_EXTMOD
  1216.  
  1217. ###
  1218. # External module support.
  1219. # When building external modules the kernel used as basis is considered
  1220. # read-only, and no consistency checks are made and the make
  1221. # system is not used on the basis kernel. If updates are required
  1222. # in the basis kernel ordinary make commands (without M=...) must
  1223. # be used.
  1224. #
  1225. # The following are the only valid targets when building external
  1226. # modules.
  1227. # make M=dir clean Delete all automatically generated files
  1228. # make M=dir modules Make all modules in specified dir
  1229. # make M=dir Same as 'make M=dir modules'
  1230. # make M=dir modules_install
  1231. # Install the modules built in the module directory
  1232. # Assumes install directory is already created
  1233.  
  1234. # We are always building modules
  1235. KBUILD_MODULES := 1
  1236. PHONY += crmodverdir
  1237. crmodverdir:
  1238. $(cmd_crmodverdir)
  1239.  
  1240. PHONY += $(objtree)/Module.symvers
  1241. $(objtree)/Module.symvers:
  1242. @test -e $(objtree)/Module.symvers || ( \
  1243. echo; \
  1244. echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
  1245. echo " is missing; modules will have no dependencies and modversions."; \
  1246. echo )
  1247.  
  1248. module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
  1249. PHONY += $(module-dirs) modules
  1250. $(module-dirs): crmodverdir $(objtree)/Module.symvers
  1251. $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
  1252.  
  1253. modules: $(module-dirs)
  1254. @$(kecho) ' Building modules, stage 2.';
  1255. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
  1256.  
  1257. PHONY += modules_install
  1258. modules_install: _emodinst_ _emodinst_post
  1259.  
  1260. install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
  1261. PHONY += _emodinst_
  1262. _emodinst_:
  1263. $(Q)mkdir -p $(MODLIB)/$(install-dir)
  1264. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
  1265.  
  1266. PHONY += _emodinst_post
  1267. _emodinst_post: _emodinst_
  1268. $(call cmd,depmod)
  1269.  
  1270. clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
  1271.  
  1272. PHONY += $(clean-dirs) clean
  1273. $(clean-dirs):
  1274. $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
  1275.  
  1276. clean: rm-dirs := $(MODVERDIR)
  1277. clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
  1278.  
  1279. help:
  1280. @echo ' Building external modules.'
  1281. @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
  1282. @echo ''
  1283. @echo ' modules - default target, build the module(s)'
  1284. @echo ' modules_install - install the module'
  1285. @echo ' clean - remove generated files in module directory only'
  1286. @echo ''
  1287.  
  1288. # Dummies...
  1289. PHONY += prepare scripts
  1290. prepare: ;
  1291. scripts: ;
  1292. endif # KBUILD_EXTMOD
  1293.  
  1294. clean: $(clean-dirs)
  1295. $(call cmd,rmdirs)
  1296. $(call cmd,rmfiles)
  1297. @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
  1298. \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
  1299. -o -name '*.ko.*' \
  1300. -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
  1301. -o -name '*.symtypes' -o -name 'modules.order' \
  1302. -o -name modules.builtin -o -name '.tmp_*.o.*' \
  1303. -o -name '*.gcno' \) -type f -print | xargs rm -f
  1304.  
  1305. # Generate tags for editors
  1306. # ---------------------------------------------------------------------------
  1307. quiet_cmd_tags = GEN $@
  1308. cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
  1309.  
  1310. tags TAGS cscope gtags: FORCE
  1311. $(call cmd,tags)
  1312.  
  1313. # Scripts to check various things for consistency
  1314. # ---------------------------------------------------------------------------
  1315.  
  1316. PHONY += includecheck versioncheck coccicheck namespacecheck export_report
  1317.  
  1318. includecheck:
  1319. find $(srctree)/* $(RCS_FIND_IGNORE) \
  1320. -name '*.[hcS]' -type f -print | sort \
  1321. | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
  1322.  
  1323. versioncheck:
  1324. find $(srctree)/* $(RCS_FIND_IGNORE) \
  1325. -name '*.[hcS]' -type f -print | sort \
  1326. | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
  1327.  
  1328. coccicheck:
  1329. $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
  1330.  
  1331. namespacecheck:
  1332. $(PERL) $(srctree)/scripts/namespace.pl
  1333.  
  1334. export_report:
  1335. $(PERL) $(srctree)/scripts/export_report.pl
  1336.  
  1337. endif #ifeq ($(config-targets),1)
  1338. endif #ifeq ($(mixed-targets),1)
  1339.  
  1340. PHONY += checkstack kernelrelease kernelversion
  1341.  
  1342. # UML needs a little special treatment here. It wants to use the host
  1343. # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
  1344. # else wants $(ARCH), including people doing cross-builds, which means
  1345. # that $(SUBARCH) doesn't work here.
  1346. ifeq ($(ARCH), um)
  1347. CHECKSTACK_ARCH := $(SUBARCH)
  1348. else
  1349. CHECKSTACK_ARCH := $(ARCH)
  1350. endif
  1351. checkstack:
  1352. $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
  1353. $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
  1354.  
  1355. kernelrelease:
  1356. @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
  1357.  
  1358. kernelversion:
  1359. @echo $(KERNELVERSION)
  1360.  
  1361. # Clear a bunch of variables before executing the submake
  1362. tools/: FORCE
  1363. $(Q)mkdir -p $(objtree)/tools
  1364. $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/
  1365.  
  1366. tools/%: FORCE
  1367. $(Q)mkdir -p $(objtree)/tools
  1368. $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/ $*
  1369.  
  1370. # Single targets
  1371. # ---------------------------------------------------------------------------
  1372. # Single targets are compatible with:
  1373. # - build with mixed source and output
  1374. # - build with separate output dir 'make O=...'
  1375. # - external modules
  1376. #
  1377. # target-dir => where to store outputfile
  1378. # build-dir => directory in kernel source tree to use
  1379.  
  1380. ifeq ($(KBUILD_EXTMOD),)
  1381. build-dir = $(patsubst %/,%,$(dir $@))
  1382. target-dir = $(dir $@)
  1383. else
  1384. zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
  1385. build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
  1386. target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
  1387. endif
  1388.  
  1389. %.s: %.c prepare scripts FORCE
  1390. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1391. %.i: %.c prepare scripts FORCE
  1392. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1393. %.o: %.c prepare scripts FORCE
  1394. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1395. %.lst: %.c prepare scripts FORCE
  1396. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1397. %.s: %.S prepare scripts FORCE
  1398. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1399. %.o: %.S prepare scripts FORCE
  1400. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1401. %.symtypes: %.c prepare scripts FORCE
  1402. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1403.  
  1404. # Modules
  1405. /: prepare scripts FORCE
  1406. $(cmd_crmodverdir)
  1407. $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
  1408. $(build)=$(build-dir)
  1409. %/: prepare scripts FORCE
  1410. $(cmd_crmodverdir)
  1411. $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
  1412. $(build)=$(build-dir)
  1413. %.ko: prepare scripts FORCE
  1414. $(cmd_crmodverdir)
  1415. $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
  1416. $(build)=$(build-dir) $(@:.ko=.o)
  1417. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
  1418.  
  1419. # FIXME Should go into a make.lib or something
  1420. # ===========================================================================
  1421.  
  1422. quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
  1423. cmd_rmdirs = rm -rf $(rm-dirs)
  1424.  
  1425. quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
  1426. cmd_rmfiles = rm -f $(rm-files)
  1427.  
  1428. # Run depmod only if we have System.map and depmod is executable
  1429. quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
  1430. cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
  1431. $(KERNELRELEASE) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))"
  1432.  
  1433. # Create temporary dir for module support files
  1434. # clean it up only when building all modules
  1435. cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
  1436. $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
  1437.  
  1438. # read all saved command lines
  1439.  
  1440. targets := $(wildcard $(sort $(targets)))
  1441. cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
  1442.  
  1443. ifneq ($(cmd_files),)
  1444. $(cmd_files): ; # Do not try to update included dependency files
  1445. include $(cmd_files)
  1446. endif
  1447.  
  1448. # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
  1449. # Usage:
  1450. # $(Q)$(MAKE) $(clean)=dir
  1451. clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
  1452.  
  1453. endif # skip-makefile
  1454.  
  1455. PHONY += FORCE
  1456. FORCE:
  1457.  
  1458. # Declare the contents of the .PHONY variable as phony. We keep that
  1459. # information in a variable so we can use it in if_changed and friends.
  1460. .PHONY: $(PHONY)
Advertisement
Add Comment
Please, Sign In to add comment
Advertisement
Public Pastes
Advertisement
We use cookies for various purposes including analytics. By continuing to use Pastebin, you agree to our use of cookies as described in the Cookies Policy.  OK, I Understand
Not a member of Pastebin yet?
Sign Up, it unlocks many cool features!